Tray attachment for blackboards.



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' LW. HAINLINE. TBM-V ATTAOHMENT PoR BLAcKBoARDs. APPLIOATIONFILED MAB..26, 1908'.

Patented June 1,1909.

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923,262. Patented June-1,1909,A

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No. 923,262. n

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Joniv` w. -IAINLINE, or LAVJUNTA, COLORADO.

f i TRAY ATTACHMENT FOR BLACKBOARDS.

To all whom, it may Concern:

Be it known that I, JOHN W'. HAINLINE, a

` citizen of. theUnit-ed States, residing at La Junta, in the county ofyOtero and State of Colorado, have invented certain new and usefulrImprovements 'f in Tray Attachments for Blaokboards, ofwhich thefollowing is a specification.

This invention pertains yto certain new and useful yimprovements in trayattach ments forblaokboards, and has for its object to generally`simplify, ylessen the cost of manufacture, increasethe ehciency and provide'a ythoroughly practical device of this hype; fp l vA ,further`object of the invention is to provide for the'easy removal and replaceonthe same line as Fig. 4but showing the parts in perspective, and Fig. 6,is a fragmental-y perspective.

The blackboardto which the device is applied, is designated 1, and tothe latter is securedr brackets 2, having Opposite right angular endsy8,4, the former of which is ycountersunk in the blackboard and securedthereto as byfastenings 5, and the latter of which contributes partial`support for the foraminous trap or screen 6. The bottoni of screen6,'rests upon and receives support from the horizontal portions of thebrackets 2, the latter being enployed in such` numbers as is demanded bythe length of the screen 6.

7 denotesy an openr frame for screen 6, which is formed with a wide backplate 8 having its upper end, portion inclined as at j 9 so as toclosely engage` with the board 1,

' and has vits lower rend portion disposed at an Opposite inclinationyasat 10 to direct the chalk Ldust onto screen G. The ends 11,. of frame 7,likewise have their lower end portions inclined inwardly and downwardlyas at 12, for a similar' purpose which is also true of the side 13, asindicated at 14. The side 13,'of the frame is formed with an eX-ytension l5,y whichy extends outwardly and j Specification of LettersPatent.

y' i); Application filed March 26, 1908. Serial N o. 423,416.

Patented June 1, 1909.

then downwardly as atv 16, and 17, respectively, its end being foldedover as at 18 to present a finished appearance and to add strength andrigidity.

In order to afford a firm substantial seating for the back plate 8,there is interposed between the rear upturned end of the side of screen6, a strip 19, fastening means as 20, being projected through plate 8,the screen 6, and strip 19, and tie rear end of the'U- shaped bracket21, by means of which the said parts are obviously secured in unison tothe board 1.

Bracket 21, supports the imperforate tray sections at their innerOverlapping ends being disposed for this purpose central of the lengthof frame 7. The outer end of bracket 21 extends upwardly in the spacebetween side 13 and its extension 17 of the frame and is supported by abolt 22, which passes through said side and extension 17 thereof, thebolt at the same time extending through the end portion of the outerside of screen 6. It will be Vobserved that the mesh material of screen6 is drawn taut Or stretched so as to closely engage about the frame 7.f

23 and 24 designate the imperforate tray sections each of approximateU-shape and provided with knobs 25, 26 to assist in the manipulationthereof. As shown more clearly in Figs. 4 and 5, the tray sections 23and 24 are in overlapped or telescopic relation whereby they areconjoint-ly supported by the bracket 21. The ends of the tray designated26, are each formed with a marginal inwardly n extending flange 27 whosepurpose and function are to receive the outer ends of the tray sectionsand support the same against downward movement. Bolts 28 extend throughthe end of the anges 27 at the point where the latter' eX- tend in thespace between side 13 and its eX- tension 17, of the frame 7, and screws29, through the ends of flanges 27, where the latter enter the space asshown in Fig. 2, between bracket 27 and the side of screen 6. Thus theends of the trays are pivotally connected to the frame 7 and relatedparts as set forth enabling the ends to be turned outwardly to theposition indicated by dotted lines Fig. 1. As shown in dotted lines at30, the tray sections`28, 24 have their ends rounded so as to moreeasily be brought into overlapped relation, this being also true of theinner ends of lianges 27 of ends 26, which are also rounded as at 31, so

as to lessen any possibility of interference when swinging ends 26 tonormal position.

In operation it will be noted that by mere outward movement of either ofends 26 on their pivotal points will enable the correspondingly locatedtray section to be removed without disturbing the other tray, whicheliminates the awkward practice of removing` a single tray of a lengthdiliicult to manipulate when the collected chalk dustI and particles areto be removed.

that is claimed is 1. A device of the type set forth embodying an openframe, a screen secured to said frame, a plurality of tray sections,means to support the inner adjacent ends of said sections, and means atthe ends of the frame to support the outer ends of said sections, saidmeans being movable to permit said sections to be removed and replacedindependent of one another.

2. A device of the type set forth consisting of a frame, a screencarried by the frame, tray sections, means to support the adjacent endsof said sections and pivoted ends for said trays having means to supportthe outer ends thereof.

3. A device of the type displayed consisting of a frame having a screenbottom, a bracket central of the length of said frame, tray sectionshaving their adjacent ends overlapped and supported by said bracket, andpivoted ends for the outer ends of said tray sections having inwardlyextending flanges on which said tray ends seat and are supported.

A. A device of the type set forth, composed of a frame, a plurality oftray sections having their adjacent ends arranged in contactingrelation, means carried by the frame to support said sections at theirpoint of contact, and means at the outer ends of the sections to supportsame and to allow removal and replacement of any one of the traysections independent of the other.

5. A device as set forth embodying an open frame having a back, frontand ends, said back being extended upwardly and said front beingextended outwardly and downvardly, a bracket secured to said back andextending in the space between said front and its extension, and a traysupported from said bracket.

6. A device as set forth embodying a frame having a back, and a frontformed with an extension which projects outwardly and then downwardly, abracket secured to the back and in the space between the front and itsextension, and a tray supported from said bracket and having the top ofits front side extending in the space between said frame front and itsextension.

7. In combination with a frame having a foraminous bottom, tray sectionshaving adjacent ends in overlapped relation, and elements for closingthe outer ends of the trays and for supporting said outer ends, saidelements being movable so as to permit individual removal andreplacement of the trays.

S. A device of the type set forth embodying a frame having a back, aforaminous bottom, and a front having an extension which projectsoutwardly and downwardly, a plurality of tray sections having the upperfree end parts of their fronts disposed on the rear of said extension ofsaid frame front, and means to secure said tray sections in position.

9. A device of the type set forth embodying a frame, a pair of traysections having their adjacent ends arranged in contacting relation,means to support said adjacentends of the tray sections, and combinedmeans to support the outer ends of said tray sections and to provideclosures for said outer ends of the tray sections.

10. A device of the type set forth embodying a frame, tray sectionsarranged to have their adjacent ends overlap, means to support said traysections from an intermediate point on said frame, and means carried bysaid frame for supporting the outer ends of the tray sections.

In testimony whereof I affix my signature, in presence of two witnesses.

' JOHN W. HAINLINE. lilitnesses Jol-IN E. TURNER, Jol-1N J. ALLIsoN.

